内容正文:
2025-2026学年一线教师制作新教材英语同步精品系列资料,名师遴选!
2025-2026学年一线教师制作新教材英语同步精品系列资料,名师遴选!
学校:___________姓名:___________班级:___________考号:___________
Unit 2 Great inventions and discoveries
重点语法:感叹句精讲精练40题
每小题2分,总80分,限时30分钟
语法知识精讲
类别
句式(Pattern)
示例(Example)
备注(Notes)
What 引导的感叹句
What + a/an (+ adj.) +单数可数名词 (+ subject + v. )!
What a surprise (it is)!
What a clever idea (the girl thought of)!
What an important invention (the wheel is)!
1. 可在句前加感叹词增强效果(如 Hooray! Wow!);2. 避免过度使用,口语中比书面语常用;
3. 感叹号仅用一次
What 引导的感叹句
What + adj. + 不可数 /复数可数名词 (+ subject + v.)!
What nice music (it is)!
What inspiring words (he said)!
How 引导的感叹句
How + adj. / adv. (+ subject + v. )!
How lucky!How brilliant the invention is!
How carefully he designed the machine!
语法知识精练
一、单项选择
1.________ fun we have playing basketball with our friends after school!
A.What a B.What C.How D.How a
2.________ exciting news it is! Our class won the first prize in the school English competition.
A.What B.What an C.How D.How an
3.—It rained yesterday, so we couldn’t climb the mountains.
—________ terrible day it was!
A.What a B.How a C.What D.How
4.—________ sweet music! I like it very much.
— You’re right. I like it very much.
A.What B.What a C.How D.How a
5.________beautiful place Yunnan is! ________ amazing the scenery is!
A.How; What B.What; How C.What a; How D.How; What an
6.—Which do you like best among the local food in Shangrao?
—Oh, the steamed fish with chili peppers. __________ delicious meal it is! I want to eat it again.
A.What a B.What C.How a D.How
7.—This is a photo of our family.
—Wow, happy family!
A.what B.how a C.what a D.how
8.—It was sunny a few minutes ago, but it’s raining heavily now!
—________ difference a day makes!
A.What B.What a C.How D.How a
9.—________ successful table tennis player Sun Yingsha is!
—Yes. But her success didn’t come easily. It comes from her hard work.
A.How a B.How C.What D.What a
10.Athletes keep training even when they feel tired. They never give up on their dreams. ________ strong their spirit is!
A.How B.What C.What a D.How a
11.—________ delicious the hot and sour soup tastes!
—Thank you. I learned to cook it online.
A.How B.What C.How a D.What a
12.— ________ great and wonderful the lantern festival is!
—Look at the square! ________ colorful lanterns!
A.What; How B.What; What C.How; What D.How; How
13.— ________ interesting story about Fairy Lake we heard just now!
—Yes, and ________ exciting the experience of visiting Fairy Lake is!
A.What an; how B.What; what C.How; how an D.How an; what
14.________ cold day it is! Wear your scarf, Helen!
A.What B.How C.What a D.How a
15.—________ special class we had today! We learned about kung fu.
—That’s correct.
A.How B.What C.How a D.What a
16.—What ________ bad weather it is!
—Yes, but I love ________ air after it rains. It smells so fresh.
A.a; the B./; the C.the; an D.an;/
17.________ lovely weather for the outdoor activity! Let’s enjoy the warm sunshine.
A.What a B.How C.What D.How a
18.—Did you like the book Red Star Over China after reading it?
—Like it? ________ fantastic it is! It’s my favorite now.
A.What B.How C.What a D.What an
19.— Lucy ________ her dream and won two gold medals for her country.
— ________ excellent girl!
A.achieved; How B.came true; How C.achieved; What an D.came true; What an
20.— ________ pale you look! Are you feeling all right?
— I’m not feeling well. I’ve got a toothache.
A.How a B.How C.What a D.What
二、完成句子
21.The music is very beautiful. (改为感叹句)
music it is !
22.The greeting in India is special. (改为感叹句)
the greeting in India is!
23.It’s an amazing change in Shenzhen. (改为感叹句)
amazing change it is in Shenzhen!
24.He can play the guitar beautifully. (改为感叹句)
he can play the guitar!
25.即将到来的比赛是多么有挑战性啊!
How the coming match is!
26.这是多么有用的一种关系啊!
useful kind of relationship it is!
27.What a delicious pumpkin pie it is! (改为同义句)
the pumpkin pie is!
28.The low-heat method is clever. 改为感叹句 (用what或how引导)
29.良好的沟通是多么重要啊!
good communication is!
30.How useful the dictionary is! (改为同义句)
useful dictionary it is!
31.The book is very interesting. (改为感叹句)
interesting book it is!
32.She loves her son very much. (改为感叹句强调loves)
she her son!
33.delicious, looks, the, how, dish (连词成句)
!
34.Dazhou is beautiful. (改为感叹句)
Dazhou is!
35.The ancient medical books are valuable. (改为感叹句,用what或how引导)
36.Qinghaosu is a life-saving medicine. 改为感叹句(用what或how引导)
37.汽锅鸡是一道多么有名的菜啊!
famous dish the steamed chicken soup is!
38.一些应用程序多么有用啊!他们成功让每个地方的孩子接触到了优质课程。
some apps are! They providing children everywhere with good lessons.
39.It’s important to learn earthquake safety skills. (改为感叹句)
it is to learn earthquake safety skills!
40.The little girl is brave enough to face the difficulty. (改为感叹句)
the little girl is to face the difficulty!
2
同步新教材,周周有练习,月月有重点!
1
同步新教材,周周有练习,月月有重点!
学科网(北京)股份有限公司
$
2025-2026学年一线教师制作新教材英语同步精品系列资料,名师遴选!
2025-2026学年一线教师制作新教材英语同步精品系列资料,名师遴选!
学校:___________姓名:___________班级:___________考号:___________
Unit 2 Great inventions and discoveries
重点语法:感叹句精讲精练40题
每小题2分,总80分,限时30分钟
语法知识精讲
类别
句式(Pattern)
示例(Example)
备注(Notes)
What 引导的感叹句
What + a/an (+ adj.) +单数可数名词 (+ subject + v. )!
What a surprise (it is)!
What a clever idea (the girl thought of)!
What an important invention (the wheel is)!
1. 可在句前加感叹词增强效果(如 Hooray! Wow!);2. 避免过度使用,口语中比书面语常用;
3. 感叹号仅用一次
What 引导的感叹句
What + adj. + 不可数 /复数可数名词 (+ subject + v.)!
What nice music (it is)!
What inspiring words (he said)!
How 引导的感叹句
How + adj. / adv. (+ subject + v. )!
How lucky!How brilliant the invention is!
How carefully he designed the machine!
语法知识精练
一、单项选择
1.________ fun we have playing basketball with our friends after school!
A.What a B.What C.How D.How a
【答案】B
【详解】句意:放学后和朋友们一起打篮球,我们玩得多么开心啊!
考查感叹句。What a用于引导以“a/an+形容词+单数可数名词”开头的感叹句;What用于引导以“形容词+不可数名词或名词复数”开头的感叹句;How用于引导以形容词或副词开头的感叹句;根据“…fun we have…”可知,此处fun是不可数名词,其结构应为“What+不可数名词+主语+谓语!”。故选B。
2.________ exciting news it is! Our class won the first prize in the school English competition.
A.What B.What an C.How D.How an
【答案】A
【详解】句意:多么令人兴奋的消息啊!我们班在学校英语竞赛中获得了一等奖。
考查感叹句结构。感叹句结构为:What + (a/an) + 形容词 + 名词 + 主语 + 谓语!或 How + 形容词/副词 + 主语 + 谓语!本题中“news”为不可数名词,前面不能用冠词“an”,且中心词是名词“news”,因此用“What”引导感叹句。故选A。
3.—It rained yesterday, so we couldn’t climb the mountains.
—________ terrible day it was!
A.What a B.How a C.What D.How
【答案】A
【详解】句意:——昨天下雨了,所以我们没能爬山。——多么糟糕的一天啊!
考查感叹句结构。What a多么,修饰名词;How a错误搭配;What多么,修饰名词复数或不可数名词;How多么,修饰形容词/副词。根据空后“terrible day”是“形容词+单数可数名词”结构,应用“What a+adj.+单数可数名词”的感叹句形式。故选A。
4.—________ sweet music! I like it very much.
— You’re right. I like it very much.
A.What B.What a C.How D.How a
【答案】A
【详解】句意:——多么甜美的音乐啊!我非常喜欢它。——你说得对,我也非常喜欢它。
考查感叹句的用法。What用于修饰名词(短语),结构为“What + (a/an) + 形容词 + 名词 + 主谓”;How用于修饰形容词/副词,结构为“How + 形容词/副词 + 主谓”。“music”是不可数名词,不能用“a/an”修饰,因此用“What”。故选A。
5.________beautiful place Yunnan is! ________ amazing the scenery is!
A.How; What B.What; How C.What a; How D.How; What an
【答案】C
【详解】句意:云南是一个多么美丽的地方啊!这景色多么令人惊叹啊!
考查感叹句结构。第一空后beautiful place为形容词+可数名词单数结构,应用What a引导感叹句;第二空后amazing为形容词,应用How引导感叹句。故选C。
6.—Which do you like best among the local food in Shangrao?
—Oh, the steamed fish with chili peppers. __________ delicious meal it is! I want to eat it again.
A.What a B.What C.How a D.How
【答案】A
【详解】句意:——上饶当地食物中你最喜欢哪个?——哦,辣椒蒸鱼。多么美味的一餐啊!我想再吃一次。
考查感叹句结构。感叹句的常见结构为:“What+a/an+形容词+可数名词单数+主语+谓语!How+形容词/副词+主语+谓语!”根据空后的“delicious meal”可知,中心词是单数可数名词meal,应用“What a+形容词+单数可数名词”结构。故选A。
7.—This is a photo of our family.
—Wow, happy family!
A.what B.how a C.what a D.how
【答案】C
【详解】句意:——这是我们家的照片。——哇,多么幸福的家庭啊!
考查感叹句结构。感叹句通常由“what”或“how”引导:what修饰名词,结构为“What (+ a/an) + 形容词 + 名词 + 主语 + 谓语!”;how修饰形容词或副词,结构为“How + 形容词/副词 + 主语 + 谓语!”。本题中,中心词是名词短语“happy family”,其中“family”为可数名词单数,需用“what a”修饰。故选C。
8.—It was sunny a few minutes ago, but it’s raining heavily now!
—________ difference a day makes!
A.What B.What a C.How D.How a
【答案】B
【详解】句意:——几分钟前还是晴天,但现在下大雨了!——一天的天气变化真大啊!
考查感叹句。中心词difference为可数名词单数,且发音以辅音音素开头,因此前面需要加不定冠词a,符合“What a/an + adj. + 可数名词单数 + 主语 + 谓语!”的感叹句结构。故选B。
9.—________ successful table tennis player Sun Yingsha is!
—Yes. But her success didn’t come easily. It comes from her hard work.
A.How a B.How C.What D.What a
【答案】D
【详解】句意:——孙颖莎是多么成功的一位乒乓球运动员啊!——是的。但她的成功来之不易,它来自于她的努力。
考查感叹句结构。感叹句通常由“What”或“How”引导:What+(a/an)+形容词+名词+主语+谓语!How+形容词/副词+主语+谓语!根据“successful table tennis player”可知,“player”为可数名词单数,且successful以辅音音素开头,因此应用What a来构成感叹句。故选D。
10.Athletes keep training even when they feel tired. They never give up on their dreams. ________ strong their spirit is!
A.How B.What C.What a D.How a
【答案】A
【详解】句意:运动员即使感到疲惫也坚持训练,他们从不放弃梦想。他们的精神是多么强大啊!
考查感叹句。How怎样;What什么;What a多么一个;How a,错误结构。此句为感叹句,中心词为形容词“strong”,应用how引导,结构为“How+形容词/副词+主语+谓语!”,A项符合。故选A。
11.—________ delicious the hot and sour soup tastes!
—Thank you. I learned to cook it online.
A.How B.What C.How a D.What a
【答案】A
【详解】句意:——这酸辣汤尝起来多么美味啊!——谢谢。我是在网上学的。
考查感叹句。根据句子结构“... delicious the hot and sour soup tastes!”可知,中心词是形容词delicious,应用“How+形容词/副词+主语+谓语!”的感叹句结构。故选A。
12.— ________ great and wonderful the lantern festival is!
—Look at the square! ________ colorful lanterns!
A.What; How B.What; What C.How; What D.How; How
【答案】C
【详解】句意:——元宵节多么盛大精彩啊!——看这个广场!多么绚丽多彩的灯笼啊!
考查感叹句结构。第一空后“great and wonderful”是形容词,应用“How”引导感叹句,结构为“How+形容词/副词+主谓”;第二空后“colorful lanterns”是名词短语,应用“What”引导感叹句,结构为“What+形容词+可数名词复数+主谓”。故选C。
13.— ________ interesting story about Fairy Lake we heard just now!
—Yes, and ________ exciting the experience of visiting Fairy Lake is!
A.What an; how B.What; what C.How; how an D.How an; what
【答案】A
【详解】句意:——我们刚才听到了一个关于仙女湖的多么有趣的故事啊!——是啊,参观仙女湖的经历多么令人兴奋啊!
考查感叹句的引导词。感叹句常用What或How引导,结构分别为:①What+(a/an)+形容词+可数名词单数+主语+谓语!②What+形容词+可数名词复数/不可数名词+主语+谓语!③How+形容词/副词+主语+谓语! 第一空后接“interesting story”,“story”是可数名词单数,且“interesting”以元音音素开头,需用“What an”引导;第二空后接形容词“exciting”,符合How引导的感叹句结构,需用“how”。故选A。
14.________ cold day it is! Wear your scarf, Helen!
A.What B.How C.What a D.How a
【答案】C
【详解】句意:多么冷的一天啊!海伦,戴上你的围巾。
考查感叹句结构。What多么;How多么;What a多么……的一个;How a结构错误。根据“...cold day it is!”可知,中心词是单数可数名词“day”,且“cold”是形容词修饰“day”,对应“What+a/an+形容词+单数可数名词+主语+谓语!”的感叹句结构。因此应选“What a”。故选C。
15.—________ special class we had today! We learned about kung fu.
—That’s correct.
A.How B.What C.How a D.What a
【答案】D
【详解】句意:——我们今天上了一节多么特别的课啊!我们学习了功夫。——没错。
考查感叹句。根据“…special class we had today!”以及选项可知,此处应用What引导感叹句,其结构为“What+a/an+形容词+可数名词单数+主语+谓语”。故选D。
16.—What ________ bad weather it is!
—Yes, but I love ________ air after it rains. It smells so fresh.
A.a; the B./; the C.the; an D.an;/
【答案】B
【详解】句意:——天气多糟糕啊!——是的,但我喜欢下雨后的空气。闻起来很清新。
考查冠词用法。不定冠词a/an表泛指,a用在以辅音音素开头的单数可数名词或字母前,an用在以元音音素开头的单数可数名词或字母前;定冠词the表特指。“weather”是不可数名词,前不用冠词; 空格2特指“下雨后的空气”,用定冠词the。故选B。
17.________ lovely weather for the outdoor activity! Let’s enjoy the warm sunshine.
A.What a B.How C.What D.How a
【答案】C
【详解】句意:多适合户外活动的好天气啊!让我们享受温暖的阳光吧。
考查感叹句。本题中被感叹的中心词是weather(天气),为不可数名词,因此用What引导,感叹句结构为:What + 形容词 + 不可数名词 + 主语 + 谓语!故选C。
18.—Did you like the book Red Star Over China after reading it?
—Like it? ________ fantastic it is! It’s my favorite now.
A.What B.How C.What a D.What an
【答案】B
【详解】句意:——读完《红星照耀中国》后你喜欢这本书吗?——喜欢它?它多么精彩啊!它现在是我最喜欢的书了。
考查感叹句。What多么,修饰名词;How多么,修饰形容词/副词;What a多么,修饰单数可数名词;What an多么,修饰以元音音素开头的单数可数名词。根据空后“fantastic it is”可知,fantastic是形容词,需用感叹句结构“How + 形容词 + 主语 + 谓语!”故选B。
19.— Lucy ________ her dream and won two gold medals for her country.
— ________ excellent girl!
A.achieved; How B.came true; How C.achieved; What an D.came true; What an
【答案】C
【详解】句意:——露西实现了她的梦想,并为她的国家赢得了两枚金牌。——多么优秀的女孩啊!
考查动词短语和感叹句辨析。achieved实现;came true实现。根据第一空,主语“Lucy”后接宾语“her dream”,应使用及物动词“achieve”表示“实现梦想”;“come true”为不及物短语,不能直接接宾语。第二空感叹句的中心词是单数可数名词“girl”,应用“What a/an”结构,又因“excellent”以元音音素开头,故用“What an”。故选C。
20.— ________ pale you look! Are you feeling all right?
— I’m not feeling well. I’ve got a toothache.
A.How a B.How C.What a D.What
【答案】B
【详解】句意:——你看起来多么苍白啊!你感觉还好吗?——我感觉不舒服,牙疼。
考查感叹句结构。How a,错误结构;How多么;What a多么;What多么。感叹句结构:How+形容词/副词+主语+谓语!或What+(a/an)+形容词+名词+主语+谓语!pale为形容词,且其后直接跟主语you,符合“How+形容词+主语+谓语!”的结构,无需冠词。故选B。
二、完成句子
21.The music is very beautiful. (改为感叹句)
music it is !
【答案】 What beautiful
【详解】句意:这首音乐非常优美。改为感叹句时,中心词为不可数名词“music”,需用“What”引导感叹句,结构为“What+形容词+不可数名词+主语+谓语”,此处形容词用“beautiful”来修饰名词。故填What;beautiful。
22.The greeting in India is special. (改为感叹句)
the greeting in India is!
【答案】How special
【详解】句意:在印度,问候是很特别的。感叹句的构成有两种,分别为“What+(a/an)+形容词+名词+主语+谓语!”或“How+形容词/副词+主语+谓语!”。本句中“the greeting in India”是主语,“is”是谓语,中心词“special”是形容词,所以用“How+形容词+主语+谓语!”结构来构成感叹句。故填How special。
23.It’s an amazing change in Shenzhen. (改为感叹句)
amazing change it is in Shenzhen!
【答案】 What an
【详解】句意:深圳的变化太惊人了。改为感叹句,句子应表达为“深圳发生了多么惊人的变化”,应用What引导感叹句,其结构为“What+(a/an)+形容词+可数名词单数+主语+谓语”;amazing是以元音音素开头,第二空应用an。故填What;an。
24.He can play the guitar beautifully. (改为感叹句)
he can play the guitar!
【答案】 How beautifully
【详解】句意:他吉他可以弹得很美妙。改为感叹句,根据“he can play the guitar!”可知,本句感叹句的句型为“How+副词+主谓”。beautifully是副词。故填How;beautifully。
25.即将到来的比赛是多么有挑战性啊!
How the coming match is!
【答案】challenging
【详解】根据中英文对照可知,此处缺少“有挑战性的”。“有挑战性的”在英文中常用形容词“challenging”表达。故填challenging。
26.这是多么有用的一种关系啊!
useful kind of relationship it is!
【答案】What a
【详解】根据中英文对照,空格处缺少“多么”;这是一个感叹句,修饰的是可数名词单数“relationship”,感叹句的结构为“What + a/an + 形容词 + 可数名词单数 + 主语 + 谓语!”,其中“useful”以辅音音素开头,所以用不定冠词“a”。故填What a。
27.What a delicious pumpkin pie it is! (改为同义句)
the pumpkin pie is!
【答案】 How delicious
【详解】句意:这是多么美味的南瓜派啊!改为同义句,应用感叹句的另一种结构“How+形容词+主语+谓语!”,原句中delicious为形容词,对应此结构。故填How;delicious。
28.The low-heat method is clever. 改为感叹句 (用what或how引导)
【答案】How clever the low-heat method is!
【详解】句意:低温方法很巧妙。原句核心词是形容词clever,修饰形容词用how引导感叹句,结构为“How+形容词+主谓!”;the low-heat method是主语;is是谓语。故填How clever the low-heat method is!
29.良好的沟通是多么重要啊!
good communication is!
【答案】 How important
【详解】根据中英文对照可知,缺少“多么重要”,important“重要的”,形容词,用how感叹。故填How;important。
30.How useful the dictionary is! (改为同义句)
useful dictionary it is!
【答案】 What a
【详解】句意:那本词典多么有用啊!原句是由How引导的感叹句,结构为“How+形容词+主语+谓语!”;要转换为同义句,此处需使用What引导的感叹句,结构为“What+(a/an)+形容词+可数名词单数+主语+谓语!”;“dictionary”是可数名词单数,需搭配不定冠词“a/an”;“useful”的发音以辅音音素/juː/开头,因此用不定冠词a。故填What;a。
31.The book is very interesting. (改为感叹句)
interesting book it is!
【答案】 What an
【详解】句意:这本书很有趣。要将陈述句改为以“it”结尾的感叹句,需用“What + a/an + 形容词 + 可数名词单数 + 主语 + 谓语!”的结构。“interesting”是以元音音素开头的单词,所以用“an”。故填What;an。
32.She loves her son very much. (改为感叹句强调loves)
she her son!
【答案】 How loves
【详解】句意:她是多么爱她的儿子啊!需改成感叹句并强调动词“loves”,感叹句应用“How+主语+谓语!”结构,强调动作的程度。故填How;loves。
33.delicious, looks, the, how, dish (连词成句)
!
【答案】How delicious the dish looks
【详解】根据所给标点和单词可知,此处为感叹句,以How引导的感叹句结构为How+形容词+主语+谓语,delicious“美味的”是形容词,the dish是主语,looks是谓语。故填How delicious the dish looks“这道菜看起来多么美味啊”。
34.Dazhou is beautiful. (改为感叹句)
Dazhou is!
【答案】 How beautiful
【详解】句意:达州很美。原句“Dazhou is beautiful.”中,be动词is后只有一个形容词beautiful作表语。改为感叹句时,当被感叹部分仅仅是形容词或副词时,应用how引导。结构为“How+adj.+主语+谓语!”。故填How;beautiful。
35.The ancient medical books are valuable. (改为感叹句,用what或how引导)
【答案】How valuable the ancient medical books are!
【详解】句意:这些古代医书很有价值。原句核心词是形容词valuable(有价值的),修饰形容词用how引导,直接套用“how+形容词+主语+谓语”结构。故填How valuable the ancient medical books are!
36.Qinghaosu is a life-saving medicine. 改为感叹句(用what或how引导)
【答案】What a life-saving medicine Qinghaosu is!
【详解】句意:青蒿素是一种救命药。分析原句可知,原句核心词是medicine,且为可数名词单数,形容词life-saving修饰名词,故用感叹句型“What+a/an+形容词+可数名词单数+主语+谓语”,life-saving是辅音音素开头的单词,不定冠词用a。故填What a life-saving medicine Qinghaosu is!
37.汽锅鸡是一道多么有名的菜啊!
famous dish the steamed chicken soup is!
【答案】 What a
【详解】根据中英文对照可知,此处缺少“一道多么”。分析句子结构可知这是一个感叹句,感叹句句型为“What + a/an + 形容词 + 可数名词单数 + 主语 + 谓语!”,famous“有名的”,以辅音音素开头,用不定冠词a;dish“菜”,可数名词单数。故填What;a。
38.一些应用程序多么有用啊!他们成功让每个地方的孩子接触到了优质课程。
some apps are! They providing children everywhere with good lessons.
【答案】 How useful succeed in
【详解】根据中英文对照可知,第一句是感叹句,强调形容词“有用的(useful)”,用“how”引导感叹句,结构为“How+形容词+主语+谓语”,所以前两空填How;useful;第二句表示“成功做某事”,用固定短语“succeed in doing sth.”,句子时态是一般现在时,主语“They”是复数,谓语动词用原形,所以后两空填succeed;in 。故填How;useful;succeed;in。
39.It’s important to learn earthquake safety skills. (改为感叹句)
it is to learn earthquake safety skills!
【答案】 How important
【详解】句意:学习地震安全技能是很重要的。感叹句的构成有两种:What + (a/an) + 形容词 + 名词 + 主语 + 谓语!或How + 形容词/副词 + 主语 + 谓语!本句中心词是形容词important,符合How引导的感叹句结构。故填How;important。
40.The little girl is brave enough to face the difficulty. (改为感叹句)
the little girl is to face the difficulty!
【答案】 How brave
【详解】句意:这个小女孩足够勇敢去面对困难。感叹句结构为“How + 形容词/副词 + 主语+ 谓语!”或“What + (a/an) + 形容词 + 名词 + 主语 + 谓语!”。本题符合“How + 形容词 + 主语 + 谓语!”结构,brave是形容词,the little girl是主语,is是谓语。故填How;brave。
4
同步新教材,周周有练习,月月有重点!
9
同步新教材,周周有练习,月月有重点!
学科网(北京)股份有限公司
$